mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
3.6 KiB
84 lines
3.6 KiB
/* |
|
* Copyright (c) 2012 |
|
* MIPS Technologies, Inc., California. |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions |
|
* are met: |
|
* 1. Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its |
|
* contributors may be used to endorse or promote products derived from |
|
* this software without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND |
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE |
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
|
* SUCH DAMAGE. |
|
* |
|
* Author: Nedeljko Babic (nbabic@mips.com) |
|
* |
|
* Math operations optimized for MIPS |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
/** |
|
* @file |
|
* Reference: libavcodec/celp_math.c |
|
*/ |
|
#include "libavcodec/celp_math.h" |
|
|
|
static float ff_dot_productf_mips(const float* a, const float* b, |
|
int length) |
|
{ |
|
float sum; |
|
const float* a_end = a + length; |
|
|
|
__asm__ volatile ( |
|
"mtc1 $zero, %[sum] \n\t" |
|
"blez %[length], ff_dot_productf_end%= \n\t" |
|
"ff_dot_productf_madd%=: \n\t" |
|
"lwc1 $f2, 0(%[a]) \n\t" |
|
"lwc1 $f1, 0(%[b]) \n\t" |
|
"addiu %[a], %[a], 4 \n\t" |
|
"addiu %[b], %[b], 4 \n\t" |
|
"madd.s %[sum], %[sum], $f1, $f2 \n\t" |
|
"bne %[a], %[a_end], ff_dot_productf_madd%= \n\t" |
|
"ff_dot_productf_end%=: \n\t" |
|
|
|
: [sum] "=&f" (sum), [a] "+r" (a), [b] "+r" (b) |
|
: [a_end]"r"(a_end), [length] "r" (length) |
|
: "$f1", "$f2" |
|
); |
|
return sum; |
|
} |
|
|
|
void ff_celp_math_init_mips(CELPMContext *c) |
|
{ |
|
c->dot_productf = ff_dot_productf_mips; |
|
}
|
|
|